CN116212550B - Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid - Google Patents
Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid Download PDFInfo
- Publication number
- CN116212550B CN116212550B CN202310296550.1A CN202310296550A CN116212550B CN 116212550 B CN116212550 B CN 116212550B CN 202310296550 A CN202310296550 A CN 202310296550A CN 116212550 B CN116212550 B CN 116212550B
- Authority
- CN
- China
- Prior art keywords
- flue gas
- desulfurization
- dust removal
- liquid
- wet flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000003546 flue gas Substances 0.000 title claims abstract description 105
- 239000002131 composite material Substances 0.000 title claims abstract description 61
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 59
- 230000023556 desulfurization Effects 0.000 title claims abstract description 59
- 239000000428 dust Substances 0.000 title claims abstract description 48
- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 53
- 230000005587 bubbling Effects 0.000 claims abstract description 41
- 238000005507 spraying Methods 0.000 claims abstract description 35
- 230000002745 absorbent Effects 0.000 claims abstract description 31
- 239000002250 absorbent Substances 0.000 claims abstract description 31
- 235000019738 Limestone Nutrition 0.000 claims abstract description 23
- 239000006028 limestone Substances 0.000 claims abstract description 23
- 230000001590 oxidative effect Effects 0.000 claims abstract description 21
- 239000007800 oxidant agent Substances 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 10
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 7
- 230000002708 enhancing effect Effects 0.000 claims description 4
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 4
- 229960002218 sodium chlorite Drugs 0.000 claims description 4
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 12
- 231100000719 pollutant Toxicity 0.000 abstract description 11
- 238000000746 purification Methods 0.000 abstract description 9
- 238000005406 washing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 10
- 230000002195 synergetic effect Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000010440 gypsum Substances 0.000 description 8
- 229910052602 gypsum Inorganic materials 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- 150000002191 fatty alcohols Chemical class 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- -1 fatty acid sodium monosulfate Chemical class 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 2
- 229920000053 polysorbate 80 Polymers 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 229940048842 sodium xylenesulfonate Drugs 0.000 description 2
- QUCDWLYKDRVKMI-UHFFFAOYSA-M sodium;3,4-dimethylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1C QUCDWLYKDRVKMI-UHFFFAOYSA-M 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- MPNXSZJPSVBLHP-UHFFFAOYSA-N 2-chloro-n-phenylpyridine-3-carboxamide Chemical compound ClC1=NC=CC=C1C(=O)NC1=CC=CC=C1 MPNXSZJPSVBLHP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 108700018263 Brassica oleracea SCR Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229920004890 Triton X-100 Polymers 0.000 description 1
- 239000013504 Triton X-100 Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 125000002511 behenyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- JXRVKYBCWUJJBP-UHFFFAOYSA-L calcium;hydrogen sulfate Chemical compound [Ca+2].OS([O-])(=O)=O.OS([O-])(=O)=O JXRVKYBCWUJJBP-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000019387 fatty acid methyl ester Nutrition 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- ONJQDTZCDSESIW-UHFFFAOYSA-N polidocanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO ONJQDTZCDSESIW-UHFFFAOYSA-N 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- GCRIFWNODNDUCG-UHFFFAOYSA-M sodium 2-hydroxy-3-[2-hydroxyethyl-[2-(octanoylamino)ethyl]amino]propane-1-sulfonate Chemical compound [Na+].CCCCCCCC(=O)NCCN(CCO)CC(O)CS([O-])(=O)=O GCRIFWNODNDUCG-UHFFFAOYSA-M 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- AISMNBXOJRHCIA-UHFFFAOYSA-N trimethylazanium;bromide Chemical compound Br.CN(C)C AISMNBXOJRHCIA-UHFFFAOYSA-N 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
- B01D47/021—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by bubbling the gas through a liquid bath
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention provides a grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on a composite absorption liquid, which belongs to the field of pollutant control and comprises a tower body, a bubbling unit, a spraying layer and a slurry pond, wherein: the top of the tower body is provided with a flue gas outlet, and the side surface of the tower body is provided with a flue gas inlet; the bubbling unit comprises a plurality of absorption assemblies which are arranged in parallel, a flow guide pipe in the absorption assemblies extends into a liquid-holding bubbling tank, and a composite absorbent is arranged in the liquid-holding bubbling tank and comprises a denitration oxidant and limestone slurry; the spraying layer is used for spraying limestone slurry to realize wet flue gas desulfurization; limestone slurry for desulfurization is arranged in the slurry pond. The invention sends the desulfurized flue gas into the bubbling unit to deeply remove the condensable particles and filterable particles in the flue gas, and oxidizes NO by using a denitration oxidant x And directly washing and removing to realize flue gas denitration and finally finish single-tower deep purification of various pollutants.
Description
Technical Field
The invention belongs to the field of pollutant control, and in particular relates to a grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on a composite absorption liquid.
Background
Coal is taken as ballast stone in the energy supply of China, and is a basic guarantee energy in the process of converting fossil energy into clean energy in China. In the combustion process of coal, besides the greenhouse effect caused by carbon emission, the emission of pollutants in the coal-fired flue gas also brings great harm to human health, environment and the like.
Aiming at the purification of coal-fired flue gas denitration, a low-nitrogen burner is generally adopted in China at present and is combined with an SCR technology/SNCR+SCR technology with higher denitration efficiency. After the low-nitrogen burner is adopted, the concentration of nitrogen oxides in the flue gas is about 350mg/m 3 . The SCR technology adopts a catalyst for denitration at the temperature of 300-420 ℃, the process is complex, and the catalyst is severely poisoned, deactivated and blocked. At present, 2-4 layers of catalysts are commonly adopted in the domestic coal-fired power plant SCR technology, and the phenomena of catalyst blocking and deactivation frequently occur because the catalysts are not subjected to dust removal, desulfurization and purification. The single SCR technology is difficult to meet the existing ultra-low emission requirement (less than or equal to 50 mg/m) 3 ) SNCR technology is used as a supplementary technology, and ammonia water/urea solution is adopted to remove NO at high temperature (850-1100 ℃) in a furnace x Ammonium bisulfate generated by spraying ammonia is extremely easy to cause catalyst blockage, and the ammonia escape problem brought by the technology forms a new emission source.
Aiming at the purification of coal-fired flue gas desulfurization, at present, the limestone-gypsum Wet Flue Gas Desulfurization (WFGD) technology is generally adopted in China, the removal efficiency is high, and the composite absorption tower for ultralow emission of high-sulfur coal-fired flue gas, which is proposed by CN207102313U, can be used for carrying out SO under the single-tower operation 2 From 8300mg/m 3 Removed to 20mg/m 3 The efficiency is as high as 99.8%, but the synergistic denitration can not be completed, and the bubbling efficiency of the structure is lower, and the dust removal and purification depth is insufficient.
For purifying smoke dust, an electrostatic precipitator (ESP)/cloth bag dust collector (FFs) device is commonly adopted in China, and the wet electric precipitator (WESP) device is combined to reduce the particle content in the smoke to 5mg/m 3 The following is given. However, WESP devices are complex in equipment, high in construction cost and operation cost, and bring great burden to enterprises.
Aiming at the problems, a plurality of scholars propose a wet flue gas desulfurization and denitrification device aiming at coal-fired flue gas purification, namely, an oxidant is adopted to dissolve in slurry to oxidize NO in the flue gas into more soluble NO 2 、N 2 O 3 、N 2 O 4 、N 2 O 5 . As CN101352647B discloses a wet flue gas simultaneous desulfurization and denitrification process, urea, limestone and strong oxidant potassium permanganate are added into slurry to form a composite solution, and the composite solution is used for synergistic desulfurization and denitrification, but the introduction of strong oxidant inevitably leads to partial SO 2 Oxidized to SO 3 Escaping not only can lead to waste of oxidant, but also can lead to SO with stronger hazard 3 Escape; CN105214466B discloses a wet synergistic desulfurization and denitrification process using composite absorption liquid, which adopts Fe 3+ Catalytic synergistic desulfurization and denitrification, but Fe 3+ Can have a great influence on the quality of gypsum. In view of the above problems, a grading wet desulfurization and denitrification device further appears, for example, CN113069921a discloses a wet desulfurization and denitrification integrated device and method for ship exhaust gas, CN112774421a discloses a wet flue gas desulfurization and denitrification system and process, and the above patents adopt flue gas desulfurization and denitrification firstlyThe partitioning scheme can effectively solve the SO 2 Oxidized, reduced gypsum quality and oxidant waste, but it cannot realize the synergistic dedusting problem in wet flue gas desulfurization devices.
Aiming at a wet flue gas desulfurization, denitrification and dedusting device, CN105013315A provides a wet flue gas desulfurization, denitrification and dedusting integrated system, but the wet flue gas desulfurization, denitrification and dedusting integrated system has no effective dedusting component and has low PM2.5 dedusting efficiency after passing through ESP/FFs. The device for the desulfurization, denitrification and dedusting integrated wet ultra-clean treatment of the flue gas, which is proposed by CN107875824A, adopts a packing tower to be combined with a WESP device, and has high resistance and high operation cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a grading wet flue gas ultra-clean desulfurization, denitrification and dust removal device based on a composite absorption liquid, and aims to solve the problems of low dust removal efficiency and high cost of the existing desulfurization, denitrification and dust removal device.
In order to achieve the above purpose, the invention provides a grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on a composite absorption liquid, which comprises a tower body, and a bubbling unit, a spraying layer and a slurry pond which are sequentially arranged in the tower body from top to bottom, wherein: a flue gas outlet is formed in the top of the tower body, a flue gas inlet is formed in the side face of the tower body, and the flue gas inlet is positioned between the spraying layer and the slurry pool; the bubbling unit comprises a plurality of absorption assemblies which are arranged in parallel, the absorption assemblies comprise drainage plates, a bottom plate, a liquid holding bubbling tank, guide plates and guide pipes, and the drainage plates are connected with the upper bottom plate and the lower bottom plate at staggered intervals to form a serpentine flue gas channel; the liquid-holding bubbling pond is arranged between two adjacent drainage plates and connected with a bottom plate below, and a composite absorbent is arranged in the liquid-holding bubbling pond and comprises a denitration oxidant and limestone slurry which are respectively used for wet denitration and stabilizing the pH value of the composite absorbent; the guide plate is provided with holes and is connected with the guide pipe so as to introduce the flue gas into the guide pipe through the guide plate, and meanwhile, the guide plate is arranged above the liquid-holding bubbling pond and is connected with two adjacent guide plates so as to fix the guide pipe; the guide pipe extends into the liquid level of the liquid-holding bubbling pond and is used for introducing the flue gas into the composite absorbent and forming bubbles, so that particles are trapped and dust removal is realized; the spraying layer is used for spraying limestone slurry to realize wet flue gas desulfurization; limestone slurry for desulfurization is arranged in the slurry pond.
Further preferably, the pH of the composite absorbent is 1.8 to 4.0.
Further preferably, the mass fraction of the limestone slurry in the composite absorbent is 20% -90%.
Further preferably, the denitration oxidant is one or two of sodium hypochlorite and sodium chlorite.
As a further preferred feature, the composite absorbent further comprises a surfactant for enhancing the dust removal effect.
Further preferably, the aperture ratio of the deflector is 30% -50%.
Further preferably, the flow guide pipe is provided with an air outlet hole, and the aperture of the air outlet hole is 1/20-1/10 of the diameter of the flow guide pipe.
As a further preferred aspect, the grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid further comprises a demister arranged between the flue gas outlet and the bubbling unit, and is used for removing fog drops in the flue gas.
As a further preferred mode, the grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid further comprises a tray arranged between the spraying layer and the slurry pool, wherein the tray is a porous screen plate, the thickness is 1-5 mm, the aperture is 10-50 mm, and the aperture ratio is 20-50%.
As a further preferable mode, the grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid further comprises a gas collecting ring arranged between the spraying layer and the slurry pool, and the distance between the gas collecting ring and the spraying layer is 0-3 m.
In general, the above technical solutions conceived by the present invention have the following compared with the prior art
The beneficial effects are that:
1. the flue gas in the grading wet flue gas ultra-clean desulfurization, denitrification and dust removal device provided by the invention is sprayedAfter purification, SO 2 The concentration is obviously reduced, the flue gas desulfurization can be effectively realized, and NO NO is carried out at the stage x Removing, can greatly reduce SO 3 The flue gas after desulfurization enters a bubbling unit to realize denitration and dust removal synchronization, on one hand, the gas inlet and drainage component introduces the flue gas into a composite absorbent to form bubbles, and the condensable particles and filterable particles in the flue gas are deeply removed, so that high-efficiency and low-cost flue gas dust removal is realized, and on the other hand, NO is oxidized by using a denitration oxidant x And directly washing and removing to realize flue gas denitration and finally finish single-tower deep purification of various pollutants;
2. in particular, the invention can effectively regulate and control the bubble size, strengthen the dust removal efficiency and reduce SO by optimizing the structure and the size of the bubbling unit 2 So as to strengthen the synergistic removal effect of multiple pollutants;
3. in addition, the invention optimizes the type and pH of the composite absorbent, and can avoid causing pipeline corrosion while guaranteeing the oxidation capability, desulfurization performance and denitration performance of the composite absorbent.
Drawings
FIG. 1 is a schematic structural diagram of a hierarchical wet flue gas ultra-clean desulfurization and denitrification dust removal device based on a composite absorption liquid, which is provided by the embodiment of the invention;
fig. 2 is a schematic structural diagram of a bubbling unit according to an embodiment of the present invention;
fig. 3 is a graph showing test results of an open-bubbling unit and an unopened bubbling unit in the embodiment of the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein:
the device comprises a 1-smoke outlet, a 2-demister, a 3-bubbling unit, a 3.1-drainage plate, a 3.2-liquid-holding bubbling pond, a 3.3-flow guide pipe, a 3.4-flow guide plate, 3.5-smoke, a 3.6-bottom plate, a 4-spraying layer, a 5-gas gathering ring, a 6-tray, a 7-slurry pond, an 8-oxidation fan, a 9-induced draft fan and a 10-composite absorbent slurry pond.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, the invention provides a grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on a composite absorption liquid, which comprises a tower body, a demister 2, a bubbling unit 3, a spraying layer 4 and a slurry pool 7, wherein the demister 2, the bubbling unit 3, the spraying layer 4 and the slurry pool 7 are arranged in the tower body from top to bottom, wherein:
the tower body is vertically arranged, the height of the tower body is determined according to the number of layers of the spraying layer 4 and the gas residence time, and the height is preferably 15-40 m; a flue gas inlet is formed in the side face of the tower body, is positioned between the slurry pond 7 and the spray layer 4, is connected with a flue gas inlet pipe through a draught fan 9 and is used for introducing flue gas to be treated; the included angle between the flue gas inlet and the ground is 5-15 degrees; meanwhile, the top surface of the tower body is provided with a flue gas outlet 1 for discharging the treated flue gas;
the demister 2 is arranged below the flue gas outlet 1 and is positioned at the top of the tower body and used for efficiently separating desulfurization slurry, composite absorbent and partial particulate matters carried by flue gas, and the demister 2 is one or more of a tube bundle demister, a ridge demister, a wire mesh demister and a baffle demister;
the bubbling unit 3 comprises a plurality of absorption assemblies which are arranged in parallel, wherein each absorption assembly comprises a drainage plate 3.1, a bottom plate 3.6, a liquid-holding bubbling tank 3.2, a guide plate 3.4 and a guide pipe 3.3, and the drainage plates 3.1 are connected with the upper bottom plate 3.6 and the lower bottom plate 3.6 at staggered intervals to form a snake-shaped flue gas channel for guiding and guiding flue gas; the liquid-holding bubbling pond 3.2 is arranged between two adjacent drainage plates 3.1 and is connected with a bottom plate 3.6 below, a side surface of the liquid-holding bubbling pond is provided with holes for ensuring the flow of smoke 3.5, a composite absorbent is arranged in the liquid-holding bubbling pond 3.2 and is connected with a composite absorbent slurry pond 10 to realize real-time supplementation, and the composite absorbent comprises a denitration oxidant and limestone slurry which are respectively used for wet denitration and stabilizing the pH value of the composite absorbent; the guide plate 3.4 is provided with holes and is connected with the guide pipe 3.3 to introduce the flue gas 3.5 into the guide pipe 3.3 through the guide plate 3.4, and the guide plate 3.4 is arranged at the liquid holding bubbling tank 3.2The upper part of the flue gas dust collector is connected with two adjacent drainage plates 3.1 to fix the drainage pipe 3.3, the drainage pipe 3.3 introduces the flue gas into a composite absorbent and forms bubbles during operation, the composite absorbent is used as a particulate matter trapping washing liquid, particulate matters are trapped through a liquid film formed by the bubbles to realize flue gas dust removal, and meanwhile, a denitration oxidant is used for oxidizing NO x Thereby realizing flue gas denitration and dust removal, and besides, the limestone slurry not only can absorb SO which is not completely washed 2 Can also stabilize the pH of the composite absorbent and ensure NO x Is a removal effect of (a);
the spraying layers 4 are used for spraying limestone slurry to realize wet flue gas desulfurization, the number of layers of the spraying layers 4 is 1-4, the spraying layers 4 are arranged in a crossing way, all the nozzles in the same spraying layer 4 are arranged in concentric circles, the spraying angle of the nozzles in the spraying layers 4 is 45-135 degrees, the nozzles are silicon carbide solid conical nozzles or silicon carbide hollow conical nozzles, and the coverage rate of the spraying layers 4 is 200-300%;
the slurry pond 7 is positioned at the bottom of the tower body, and comprises limestone slurry for desulfurization, a stirrer and an oxidation fan 8, wherein the slurry pond 7 is connected with a limestone slurry feeding unit, a gypsum discharging unit, a slurry circulating pump and a process water adding unit; the gypsum discharging unit is used for timely discharging oxidized calcium sulfate crystals, and enabling the oxidized calcium sulfate crystals to enter a gypsum storage room for standing after passing through a gypsum cyclone station and a vacuum belt dehydrator, wherein the humidity of dehydrated gypsum is less than 10%; the slurry circulating pump is used for pumping limestone slurry in the slurry tank 7 into the spraying layer 4, and preferably a single-suction horizontal centrifugal pump is adopted; the oxidation fan 8 is used for forcibly oxidizing the calcium sulfite and the calcium bisulfate in the slurry pond 7, and is preferably a Roots blower; the stirrer is used for mixing limestone slurry in the slurry tank 7 and strengthening dissolution of calcium carbonate so as to avoid limestone precipitation; the pH of the slurry pool 7 is monitored in the running process, and the pH of the slurry pool 7 is adjusted by adjusting the concentration of limestone in fresh slurry, wherein the pH is preferably 5-5.8, and the calcium-sulfur ratio is 1.03-1.1.
Further, the mass fraction of limestone slurry in the composite absorbent is 20-90%, and the limestone slurry is used for absorbing SO which is not completely washed 2 To stabilize the pH of the composite absorbent, the pH of the composite absorbent is 1.8-4.0, therebyEnsures the high-efficiency desulfurization and denitrification performance and avoids the corrosion to the pipeline. When the pH of the composite absorbent is too low, the composite absorbent is easy to cause pipeline corrosion and SO 2 The removal performance is weaker, and when the pH is too high, the oxidizing capacity of the oxidant is lower, and the denitration performance is weaker. The denitration oxidant is one or two of sodium hypochlorite and sodium chlorite.
Further, the composite absorbent further comprises a surfactant for enhancing the dust removing effect, and the preferred surfactant is one or more of nonionic and anionic silicone polyether (XHG-245, XHG-248), tween 80 (Tween 80), polyether silicone oil (polyether silicone oil), fatty acid sodium monosulfate complex salt (Compound No. 3), ethoxy modified polydimethylsiloxane (SILSURF A008), sodiumcapryloampho hydroxypropyl sulfonate, fluorocarbon surfactant (Capstone FS-10), fatty alcohol polyoxyethylene ether sodium sulfate (AES), alpha-alkenyl sodium sulfonate (AOS), fatty acid methyl ester ethoxylate sulfonate (FMES), coconut oil fatty acid diethanolamide (CDEA), sodium Dodecyl Sulfate (SDS) Triton (Triton X-100), fatty alcohol polyoxyethylene ether (AEO-9), coconut oil based low foam surfactant (A-7), nonylphenol polyoxyethylene ether (OP-10), fatty alcohol polyoxyethylene ether (AEO 3), nonylphenol polyoxyethylene ether (TX-10), sodium xylene Sulfonate (SX), (dodecyl, hexadecyl, docosyl, and trimethyl ammonium chloride/or trimethyl ammonium bromide.
Further, the distance between the bottom of the guide pipe 3.3 and the bottom of the liquid holding bubbling tank 3.2 is 0-10 mm. The diameter of the guide pipe 3.3 is 20 mm-200 mm, the aperture ratio of the guide pipe 3.3 on the guide plate 3.4 is 30% -50%, the guide pipe 3.3 is composed of a plurality of uniformly distributed air outlet holes, the aperture of each air outlet hole is 1 mm-10 mm, the aperture of each air outlet hole is preferably 1/20-1/10 of the diameter of the guide pipe for fully improving the pollutant purifying effect, the aperture ratio of the guide pipe 3.3 is 15% -50%, and the aperture ratio of the guide pipe is in nonlinear negative correlation with the diameter of the guide pipe 3.3. Through the interaction of the parameters, the size of bubbles can be effectively optimized, the gas-liquid mass transfer coefficient is enhanced, meanwhile, the trapping probability of particles by a liquid film is enhanced, the multi-pollution synergistic removal effect is enhanced, and the proper pressure drop is obtained. The aperture ratio of the guide plate 3.4 is maintained to be 40%, the diameter of the guide pipe 3.3 is 40mm, the aperture of the air outlet hole is 10mm, the aperture ratio is 40%, the liquid level height is 50mm, when the guide pipe stretches into the liquid level to be 30mm, the particulate removal efficiency can be realized to be more than 80%, and the pressure drop is lower than 200Pa.
Further, the wet flue gas desulfurization dust removal device further comprises a tray 6, wherein the tray 6 is arranged between the spraying layer 4 and the slurry pool 7 and is used for enhancing gas-liquid contact time, so that flue gas distribution uniformity and gas-liquid contact form can be effectively improved, and desulfurization and preliminary dust removal capability are enhanced. The distance between the tray 6 and the spraying layer 4 is preferably 1 m-3 m, a plurality of trays can be arranged in the tower, and a single tray is arranged below the single spraying layer 4. The tray 6 is a porous sieve plate, preferably with the thickness of 1 mm-5 mm, the aperture of 10 mm-50 mm, the aperture ratio of 20% -50%, the aperture arrangement of 60-degree staggered triangle arrangement, the aperture spacing of 10 mm-50 mm, the partition plate spacing among the holes in the tray 6, the height of the partition plate of 100 mm-300 mm, the partition plate spacing the holes into square, the thickness of the partition plate of 1 mm-5 mm, preferably 36-400 holes are square, namely 6X 6-20X 20 holes are square.
Further, the wet flue gas desulfurization dust removal device also comprises a gas collecting ring 5, wherein the gas collecting ring 5 is arranged below the spraying layer 4 and is used for gathering flue gas towards the center in the tower. The distance between the gas collecting ring 5 and the spraying layer 4 is preferably 0-3 m, and the gas collecting ring 5 can be arranged at a plurality of positions in the tower, so that the gas collecting ring 5 is mainly used for avoiding the escape of the gas from the position close to the wall of the tower, strengthening the gas to be close to the center in the tower, further optimizing the centering arrangement of the nozzles, and reducing the flushing of the tower body caused by the slurry sprayed by the nozzles. The top of the gas gathering ring 5 is connected with the tower body, the top and the lower wall of the tower body are arranged at an acute angle, the arrangement angle is preferably 0-90 degrees, the bottom of the gas gathering ring 5 is positioned in the space in the tower, the bottom is preferably serrated, and the slurry on the gas gathering ring 5 can be effectively crushed for the second time.
Further, the wet flue gas desulfurization dust removal device also comprises a process water adding unit which is used for cleaning a demister 2, a spray layer 4 and the like in the tower, preventing scaling and blocking in the tower and avoiding overflow phenomenon caused by overhigh liquid level in the tower; the cleaning frequency is determined by the pressure difference at two sides of the demister 2, and when the pressure difference change amplitude at two sides of the demister 2 is more than 20%, the demister is flushed, and the flushing water quantity is flushedPreferably 0.1m per MW unit 3 /h～0.2m 3 The rinsing frequency is preferably 1 to 2 h/time.
In the grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid, SO (SO) is generated after flue gas is sprayed and purified 2 The concentration is obviously reduced, the flue gas enters the bubbling unit 3, the size of bubbles is regulated and controlled by adding a surfactant and the drainage tube 3.3 to strengthen the dust removal efficiency of the flue gas, and the size of the bubbles is regulated and controlled to reduce SO (sulfur dioxide) 2 Mass transfer resistance, SO is strengthened 2 Absorbing and simultaneously oxidizing NO by adding a denitration oxidant x And directly washing and removing the waste water, thereby completing the single-tower deep purification of various pollutants.
The invention aims at the problems that the coal-fired fine particles are difficult to deeply remove and NO is difficult to deeply remove x The problem of low wet removal efficiency caused by indissolvable property is solved, the size of bubbles is regulated and controlled according to structural optimization, and the composite absorbent is prepared according to the characteristics of various pollutants, so that the problems of low synergistic dedusting efficiency and NO of the traditional desulfurizing tower are overcome x Synergistic removal of undesirable NO x SO is caused in the process of synergetic removal 2 Oxidation to form SO 3 The defects of the device are that the multi-pollutant deep removal of a single device is completed. The invention has the advantages of flexible operation, low resistance and low investment cost, improves the removal efficiency of multiple pollutants and provides a new route for purifying the coal-fired flue gas.
The principle of dust removal by using the bubbling unit 3 is that after the flue gas with particles enters the bubbling unit 3, the relative humidity RH in the flue gas is more than 100% under the cooling induction of the low-temperature composite absorbent, and the particles in the flue gas move to the inner surface of bubbles under the action force taking diffusion swimming force as the dominant action force at the moment, so that the flue gas is purified and removed, and the cooling pipe is used for primarily cooling the flue gas, so that the flue gas can be cooled to the supersaturation temperature in the bubbling unit 3. And after the flue gas is supersaturated, water in the flue gas is condensed, CPM is synchronously condensed and separated out, partial water is condensed in a heterogeneous way on the surface of the FPM, so that the FPM is promoted to grow up, and CPM and FPM efficient collaborative removal is realized.
The technical scheme provided by the invention is further described below according to a specific embodiment.
The concentration of dodecyl trimethyl ammonium chloride in the composite absorbent is 0.05g/L, the concentration of sodium chlorite is 10g/L, and the smoke amount in the experiment is 28000Nm 3 And/h, the liquid-gas ratio of the desulfurizing tower is 24L/m 3 The pH of the high-efficiency washing device is 1.8, and the liquid level is 100mm. Comparative tests of the open-bubbling unit 3 and the unopened bubbling unit 3 were carried out for three conditions, respectively, and the results are shown in FIG. 3, NO in conditions 1, 2, 3 x The concentration at the inlet is at most 74mg/Nm 3 All realize NO x The discharge concentration is lower than 15mg/Nm 3 ，SO 2 The concentration at the inlet is up to 28.3mg/Nm 3 The concentration at the middle outlet is not higher than 7mg/Nm 3 The concentration at the inlet of the particulate matter is at most 9.8mg/Nm 3 The concentration at the middle outlet is not higher than 1.5mg/Nm 3 In operation, the pressure drop of the high-efficiency washing device is 280-360 Pa. Therefore, the invention is an effective desulfurization, denitrification and dedusting integrated device, can realize the cooperative treatment of multiple pollutants, reduces the operation pressure, has obvious economic effect and has great popularization value.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. Hierarchical wet flue gas ultra-clean SOx/NOx control dust collector based on composite absorption liquid, its characterized in that, this hierarchical wet flue gas ultra-clean SOx/NOx control dust collector includes the tower body and from top to bottom sets gradually at inside bubbling unit (3) of tower body, spray layer (4) and thick liquid pond (7), wherein: a flue gas outlet (1) is formed in the top of the tower body, a flue gas inlet is formed in the side face of the tower body, and the flue gas inlet is positioned between the spraying layer (4) and the slurry pool (7); the bubbling unit (3) comprises a plurality of absorption assemblies which are arranged in parallel, the absorption assemblies comprise drainage plates (3.1), bottom plates (3.6), a liquid-holding bubbling tank (3.2), guide plates (3.4) and guide pipes (3.3), and the drainage plates (3.1) are connected with the upper bottom plates (3.6) and the lower bottom plates at staggered intervals to form a snake-shaped flue gas channel; the liquid-holding bubbling pond (3.2) is arranged between two adjacent drainage plates (3.1) and connected with a bottom plate (3.6) below, and a composite absorbent is arranged in the liquid-holding bubbling pond and comprises a denitration oxidant and limestone slurry which are respectively used for wet denitration and stabilizing the pH value of the composite absorbent; the guide plate (3.4) is provided with holes and is connected with the guide pipe (3.3) so as to introduce the flue gas (3.5) into the guide pipe (3.3) through the guide plate (3.4), and meanwhile, the guide plate (3.4) is arranged above the liquid-holding bubbling tank (3.2) and is connected with two adjacent guide plates (3.1) so as to fix the guide pipe (3.3); the flow guide pipe (3.3) stretches into the liquid level of the liquid holding bubbling pond (3.2) and is used for introducing the smoke (3.5) into the composite absorbent and forming bubbles, so that particles are trapped and dust removal is realized; the spraying layer (4) is used for spraying limestone slurry to realize wet flue gas desulfurization; limestone slurry for desulfurization is arranged in the slurry tank (7).
2. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid as set forth in claim 1, wherein the pH of the composite absorption agent is 1.8-4.0.
3. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid as claimed in claim 1, wherein the mass fraction of limestone slurry in the composite absorption agent is 20% -90%.
4. The hierarchical wet flue gas ultra-clean desulfurization and denitrification dust removal device based on composite absorption liquid according to claim 1, wherein the denitrification oxidant is one or two of sodium hypochlorite and sodium chlorite.
5. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid as set forth in claim 1, wherein the composite absorption agent further comprises a surfactant for enhancing the dust removal effect.
6. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid as claimed in claim 1, wherein the aperture ratio of the guide plate (3.4) is 30% -50%.
7. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid as claimed in claim 1, wherein the flow guide pipe (3.3) is provided with an air outlet hole, and the aperture of the air outlet hole is 1/20-1/10 of the diameter of the flow guide pipe (3.3).
8. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid according to claim 1, wherein the grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid further comprises a demister (2) arranged between a flue gas outlet (1) and a bubbling unit (3) and used for removing fog drops in flue gas.
9. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid according to claim 1, further comprising a tray (6) arranged between the spraying layer (4) and the slurry pond (7), wherein the tray (6) is a porous sieve plate, the thickness is 1 mm-5 mm, the aperture is 10 mm-50 mm, and the aperture ratio is 20% -50%.
10. The grading wet flue gas ultra-clean desulfurization and denitrification dust removal device based on the composite absorption liquid according to any one of claims 1 to 9, further comprising a gas gathering ring (5) arranged between the spraying layer (4) and the slurry tank (7), wherein the distance between the gas gathering ring (5) and the spraying layer (4) is 0-3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310296550.1A CN116212550B (en) | 2023-03-22 | 2023-03-22 | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310296550.1A CN116212550B (en) | 2023-03-22 | 2023-03-22 | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116212550A CN116212550A (en) | 2023-06-06 |
| CN116212550B true CN116212550B (en) | 2024-04-02 |
Family
ID=86582525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310296550.1A Active CN116212550B (en) | 2023-03-22 | 2023-03-22 | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116212550B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612513A (en) * | 2009-07-24 | 2009-12-30 | 渤海大学 | Mono-tower multi-stage flue gas desulfurization absorber |
| CN203469805U (en) * | 2013-09-09 | 2014-03-12 | 江阴市宏能科技有限公司 | Absorption tower device capable of simultaneously desulfurizing and denitrifying smoke through bubbling and spraying |
| CN205886590U (en) * | 2016-08-09 | 2017-01-18 | 淄博义天热能环保设备有限公司 | Gas wash tower and SOx/NOx control system |
| WO2017045602A1 (en) * | 2015-09-15 | 2017-03-23 | 中冶焦耐(大连)工程技术有限公司 | Coke oven flue gas desulfurization and denitrification combined purification process and apparatus |
| CN107261781A (en) * | 2017-08-11 | 2017-10-20 | 杭州航民江东热电有限公司 | A kind of desulphurization denitration dust pelletizing system |
| CN210751812U (en) * | 2019-09-04 | 2020-06-16 | 鞍钢实业集团冶金机械有限公司 | Dust removal SOx/NOx control integrated device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6223654B2 (en) * | 2011-10-31 | 2017-11-01 | 三菱日立パワーシステムズ株式会社 | Flue gas desulfurization equipment |
| JP6730024B2 (en) * | 2015-12-07 | 2020-07-29 | 千代田化工建設株式会社 | Liquid screen dust remover and flue gas desulfurizer |
-
2023
- 2023-03-22 CN CN202310296550.1A patent/CN116212550B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612513A (en) * | 2009-07-24 | 2009-12-30 | 渤海大学 | Mono-tower multi-stage flue gas desulfurization absorber |
| CN203469805U (en) * | 2013-09-09 | 2014-03-12 | 江阴市宏能科技有限公司 | Absorption tower device capable of simultaneously desulfurizing and denitrifying smoke through bubbling and spraying |
| WO2017045602A1 (en) * | 2015-09-15 | 2017-03-23 | 中冶焦耐(大连)工程技术有限公司 | Coke oven flue gas desulfurization and denitrification combined purification process and apparatus |
| CN205886590U (en) * | 2016-08-09 | 2017-01-18 | 淄博义天热能环保设备有限公司 | Gas wash tower and SOx/NOx control system |
| CN107261781A (en) * | 2017-08-11 | 2017-10-20 | 杭州航民江东热电有限公司 | A kind of desulphurization denitration dust pelletizing system |
| CN210751812U (en) * | 2019-09-04 | 2020-06-16 | 鞍钢实业集团冶金机械有限公司 | Dust removal SOx/NOx control integrated device |
Non-Patent Citations (1)
| Title |
|---|
| 氯酸钠与石灰石的混合浆液同时脱除NO和SO_2的实验研究;汪建光;李雨轩;郭瑞堂;李彦;;上海节能;20181031(10);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116212550A (en) | 2023-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102974185B (en) | Modularized integrated smoke purification system and method for removing plurality of pollutants | |
| CN105561776B (en) | A kind of industry coal-boiler flue gas multiple pollutant minimum discharge cooperation-removal system | |
| CN204543996U (en) | Coal-fired plant flue gas multi-pollutant deep purifying controls coupled system | |
| CN105214465A (en) | The apparatus and method of integration wet process of FGD dedusting | |
| CN202823151U (en) | Multistage spray efficient wet process of flue gas desulfurization and synergistic mercury removal integrated device | |
| CN103480223A (en) | Wet-type fume purification system and purification method for high smoke speed PM2.5 and pollutant | |
| CN103785275A (en) | Desulfurization, dedusting and denitration integrated flue-gas purifier | |
| CN206276171U (en) | A kind of high-efficiency flue gas desulfurization cleaner | |
| CN105195004A (en) | Combined desulphurization and dedusting apparatus and method for wet flue gas | |
| CN101007238A (en) | Radial grading desulfurization dust-removing device | |
| CN103506002A (en) | Two-section bicirculating spraying and padding composite absorption tower | |
| CN204637975U (en) | Flue gas desulfurization enhancing device | |
| CN210079219U (en) | Active coke combined desulfurization and denitrification system | |
| CN102309920B (en) | Method for removing NOx and SOx from fluid catalytic cracking (FCC) flue gas | |
| CN107913589A (en) | A kind of desulfurization of flue gas cleaning discharge and low-temperature denitrifying system and technique | |
| CN205760536U (en) | A kind of device of oxidizing process gas cleaning desulfurization denitration demercuration | |
| CN208711402U (en) | A kind of high-efficiency multi-stage spraying foam dust-removing desulfurating apparatus | |
| CN203777911U (en) | Desulfuration, dedusting and denitration integrated flue gas cleaner | |
| CN116212550B (en) | Hierarchical wet flue gas ultra-clean desulfurization denitration dust collector based on composite absorption liquid | |
| CN203916431U (en) | A kind of gaseous oxidation is in conjunction with the flue gas combined desulfurization and denitration device of wet absorption | |
| CN210057763U (en) | Smoke dust removing, desulfurizing and white smoke eliminating tower | |
| CN202620997U (en) | Integrated device for purifying flue gas generated during refuse burning | |
| CN205948624U (en) | Industry flue gas dry -type low temperature is in coordination with removing dust SOx/NOx control removal of mercury integrated device | |
| CN212440689U (en) | Rectification grid type desulfurization and denitrification and acid mist removal device | |
| CN205055799U (en) | Device that integration wet flue gas desulfurization removed dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |